What types of piezo are like them?
Are they AC or DC/Active or Passive piezo buzzers?
https://www.mgelectronic.rs/piezo-element-pb-1220pf-1q
https://www.mgelectronic.rs/piezo-horna-khs-106
Can somebody suggest me the proper NE555 circuit for driving this two components?

 

The Piezo Element has a sealed enclosure so it will produce only the resonant frequency of 2048Hz. They say AC but usually those beepers have an oscillator inside and operate from DC.

The horn is an AC speaker but usually a piezo horn sounds awful. A few frequencies will be loud.

A 555 produces a rough-sounding squarewave.

 

Can somebody suggest me the proper NE555 circuit for driving this two components?

From the datasheet for the PB-1220-PF-1Q :

This 555 circuit might work. Frequency appx 2200hz.

 

Are they AC or DC/Active or Passive piezo buzzers?

According to the M&G advert they expect a supply of 1.2-2.5 V AC .
According to the linked Hitpoint datasheet in the M&G advert they need a 1.25-2.5 V DC supply.
Take your pick. My guess would be DC. If it's DC then there is likely a polarity indication moulded into the plastic housing.

 

People who make or sell no-name-brand junk know no details about it.

 

According to the M&G advert they expect a supply of 1.2-2.5 V AC .

But the linked datasheet clearly says DC. And the terminals are clearly polarized.

 

And the datasheet clearly shows a square wave driver for the PB-1220 and the impedance is listed at 16 ohms.

 

And the datasheet clearly shows a square wave driver for the PB-1220 and the impedance is listed at 16 ohms.

Yes, but not crossing zero. I understand why they call it DC when it is actually not purely AC or DC.

 

From the datasheet for the PB-1220-PF-1Q :
View attachment 298101
This 555 circuit might work. Frequency appx 2200hz.

View attachment 298102

I assembled it and this circuit works.

 

Can somebody suggest me the proper NE555 circuit for driving this horna siren?
https://forum.allaboutcircuits.com/attachments/5-png.298094
https://www.mgelectronic.rs/piezo-horna-khs-106

May I use the same circuit for it?

 

A Piezo horn tweeter produces some loud resonant frequencies but also produces some frequencies that are not loud. You need to tune its frequency for it to be loud.
It sounds like a high pitch beep, not like a siren.

 

The piezo horn speaker will not work being driven with only one transistor because it does not have a coil, it is a capacitor. The 555 can drive it but with a supply of only 5V it will not be loud.

 

I read the speaker can be driven by a single ended signal 0 to 5 volt or a bipolar signal. The specs rate the speaker at 8 or 4 ohms.

 

A piezo tweeter cannot be driven by a single-ended signal but works when it is parallel with a resistor or the coil of a woofer.
The specs rate the woofer speaker with 4 ohms or 8 ohms so that the piezo tweeter can match the loudness of the woofer.

 

For a 5 volt supply

A piezo tweeter cannot be driven by a single-ended signal but works when it is parallel with a resistor

Like this if limited to a 5 volt supply?

 

The output of an audio amplifier or a 555 is push-pull, not single-ended. Then the parallel resistor is not needed.
With a 5V supply, the output of an NE555 is only about 3.6V so the piezo will not be loud.

 

That's why I connected it using the low side switching to get the full 5 volts.

 

I do not know if an output resistor to +5V will pull-up the output of an old NE555 or old LM555 to +5V. If it does then the +2.5dB will barely be noticeable.

 

Agree, not much volume with a 5 volt supply but that was just an example. Depending on what the TS requirements are there other options.

 

How to increase voltage for horn siren?
I don't have 2SD882 I use MJE13007 instead.
If I connect R Base 100R horn does not work?

The Max voltage is 35 V for horn.

How to connect an inuctor to this circuit?
What inductivity should it be?

PIEZO horn KHS 106
Code:
ZV-KHS106
Specification:
300/150 W , 2-20 KHz , 90 dB

Technical specification:
Dymensions: 95 mm
Music power (4 Ohm) : 300W
Music power (8 Ohm) : 150W
Frequency range: 2000 - 20000 Hz
Sensitivity: 90 dB
Max. voltage: 35 V ~

A piezo tweeter cannot be driven by a single-ended signal but works when it is parallel with a
resistor
According to the M&G advert they expect a supply of 1.2-2.5 V AC .
According to the linked Hitpoint datasheet in the M&G advert they need a 1.25-2.5 V DC supply.
Take your pick. My guess would be DC. If it's DC then there is likely a polarity indication
moulded into the plastic housing.

A Piezo horn tweeter produces some loud resonant frequencies but also produces some
frequencies that are not loud. You need to tune its frequency for it to be loud.
It sounds like a high pitch beep, not like a siren.

I added a trimmer resistor from 0 to 100K.

The piezo horn speaker will not work being driven with only one transistor because it does not
have a coil, it is a capacitor. The 555 can drive it but with a supply of only 5V it will not
be loud.

What induction coil I need to use for Horn?

I read the speaker can be driven by a single ended signal 0 to 5 volt or a bipolar signal. The
specs rate the speaker at 8 or 4 ohms.

I use MJE13007G.
If I connect trimmer R to Base and set it to 100R value horn will not work.
I set trimmer R on Base to 1K.